The reason you want to "de-personalize" your home is because you want buyers to view it as their potential home. When a potential homebuyer sees your family photos hanging on the wall, it puts your own brand on the home and momentarily shatters their illusions about owning the house. Therefore, put away family photos, sports trophies, collectible items, knick-knacks, and souvenirs. Put them in a box. Rent a storage area for a few months and put the box in the storage unit.
Do not just put the box in the attic, basement, garage or a closet. Part of preparing a house for sale is to remove "clutter," and that is the next step in preparing your house for sale.